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New adaptive IIR notch filter and its application to howling control in speakerphone system

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2 Author(s)
Kuo, S.M. ; Dept. of Electr. Eng., Northern Illinois Univ., Dekalb, IL, USA ; Chen, J.

A new second order IIR adaptive notch filter which has a faster convergence rate was developed to control howling in a speakerphone system. Simulation results obtained using real hybrid and acoustic transfer functions show an 8-14 dB howling margin enhancement with this new technique.

Published in:

Electronics Letters  (Volume:28 ,  Issue: 8 )